w25q16cl Winbond Electronics Corp America, w25q16cl Datasheet - Page 54
w25q16cl
Manufacturer Part Number
w25q16cl
Description
2.5v 16m-bit Serial Flash Memory With Dual And Quad Spi
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W25Q16CL.pdf
(77 pages)
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11.2.34 Read Unique ID Number (4Bh)
The Read Unique ID Number instruction accesses a factory-set read-only 64-bit number that is unique to
each W25Q16CL device. The ID number can be used in conjunction with user software methods to help
prevent copying or cloning of a system. The Read Unique ID instruction is initiated by driving the /CS pin
low and shifting the instruction code “4Bh” followed by a four bytes of dummy clocks. After which, the 64-
bit ID is shifted out on the falling edge of CLK as shown in figure 32.
DO
DO
DO
DO
*=MSB
*=MSB
24 25
24 25
26
26
27 28
27 28
Figure 32. Read Unique ID Number Instruction Sequence
29 30
29 30
31 32 33
31 32 33
34
34
- 54 -
35 36
35 36
37 38
37 38
39
39
*
*
40
40
63 62 61 60 59
63 62 61 60 59
41
41
42 43 44 101 102 103
42 43 44 101 102 103
2
2
W25Q16CL
1
1
0
0
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